Toshiba QuietCo2OL Notice D'instructions page 85

MAINTENANCE
Défaut
1. Suction temperatur e too
high
2. Suction Temperature too
low
3. Suc tion pressure too low
4. Compressor cuts in and
out too often on LP saf ety
switch
5. Suction pressure too h igh
6. Gas cooler pressure t oo
high
7. Gas cooler pressure too
low
8. Discharge temperatu re
too high
9. Capacity too high
10. Insufficient capac ity
Cause probable
Too much suction gas superheat
(above 20 K)
Liquid in the suction line
Sensor is loose or incorrectly
pos itioned
Set point wrongly set
Too much oil in the evaporato rs
Filter in the liquid line clogged
Too much superheat of
suction gas
Ins tallation insufficiently
ch arged
See point 3
Evaporator iced over or frozen
w ater present in the distributor
MOP
Restart after defrost
Compression problem
Insufficient flow of air into
the gas cooler
Installation overcharged
Air or non-condensable gas in the
HP circuit
Fan cut-in incorrectly set
Too much superheat on suction
Internal by-pass
Problem with control system or
ot her automatic devices
N o correspondance between t he
un it and the cooling demand
Problem with control system or
ot her automatic devices
N o correspondance between t he
un it and the cooling demand
Action requise
Examine and adjust the thermostatic
expansion valve in the evaportors
Ad just the thermostatic expansi on
valve
Check if the sensor is in contact with
the suction line and replace if
ne cessary
Check the set point
Clear out the oil from the
evaporator
Examine and clean filters in liquid
line
Ad just thermostatic expansion va lves
Cha rge the installation with
re frigerant
Cl ean or defrost evaporator
Set a MOP on the evaporator
con troller (see P 24)
Wait for confirmation
Change compressor
Clean the gas cooler. Check motor
fans
Drain liquid into reservoir
Drain, use a vacuum pump and
recharge
Ad just
Adjust thermostatic expansion valves
Check compressors
Rep lace, repair or re-set
Che ck the design of the installati on
Rep lace, repair or re-set
Che ck the design of the installati on
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